82431-34-3

Upstream product

• 826-62-0 5-norbornene-2,3-dicarboxylic anhydride 
• 67913-05-7 endo-cis-2-carboxy-3-(ethoxycarbonyl)bicyclo<2.2.1>hept-5-ene 
• 82431-29-6 endo-cis-2-(dimethylcarbamoyl)-3-(ethoxycarbonyl)bicyclo<2.2.1>hept-5-ene 
• 82431-28-5 (1S,2R,3S,4R)-3-Chlorocarbonyl-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid ethyl ester 
• 56679-25-5 2-endo-<(dimethylamino)methyl>-3-endo-(hydroxymethyl)bicyclo<2.2.1>hept-5-ene 
• 82431-30-9 endo-2-(hydroxymethyl)-3-methylenebicyclo<2.2.1>hept-5-ene 
• 98-59-9 p-toluenesulfonyl chloride 

Downstream Products

• 82431-43-4 4-Oxo-octahydro-2,5-cyclo-pentalene-1-carbonyl chloride 

Relevant academic research and scientific papers

Synthesis of the D2d-Dinoradamantane Derivatives Having Two Coaxially Oriented Unsaturated Centers. 6-Methylene-D2d-dinoradamantan-2-one and D2d-Dinoradamantane-2,6-dione

From the cyclopentadiene-maleic anhydride adduct was prepared the norbornenecarboxylic acid 22.Treatment of the acid chloride 23 with triethylamine afforded the tetracyclic ketone 24 which was converted into the dinoradamantanecarboxylic acid 25 by a basic ring-opening reaction.The sequence of conversions involving the Cope elimination of the amine oxide derived from the amine 31 provided 6-methylene-D2d-dinoradamantan-2-one (6) whose OsO4-NaIO4 oxidation eventually yielded D2d-dinoradamantane-2,6-dione (7) of D2 symmetry.